is 2 1827799 - 1
has 550223 decimal digits
takes 0.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8B85D765411F1AE7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.610269.1176%28615261827799000.99628.3332%33.606471.6911%2.5735%
PrimeNet2570.010563.1579%80001500000.00122.8785%0.011764.2184%1.0605%
GPU722610.168165.5738%90001400000.00131.5942%0.169366.1226%0.5488%
Difference+7+32.4421+3.5439%+2852526+182639900+0.9949+6.7390%+33.4370+5.5685%+5.5685%

Known prime factors (1 factor, 73.2 bits, 0.00400217% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1827799104920215117401702459532373.1522870124535504224
25 × 32 × 20143 × 494748061
2019-11-24201434947480612,057.82.12193.9603

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-12-31T14:27:00markrtiny2750006000000---0.046--3.526%
2015-10-06T21:30:11Bruno Victal5820K-linux5000001500000012---0.101--4.599%
2016-08-23T15:10:32Jocelyn LaroucheManual testing5000003000000012---0.166--5.211%
2016-10-07T05:52:36Jocelyn Larouchelow 4M500000360000006---0.191--5.374%
2016-10-27T15:20:23Jocelyn Larouchelow 4M798600798600---0.063--2.159%
2016-10-29T20:53:42Jocelyn Larouchelow 4M958320958320---0.075--2.321%
2017-03-17T06:02:32Jocelyn Larouchelow 4M13799801379980012---0.162--5.017%
2017-03-21T00:47:12Jocelyn Larouchelow 4M16559761655976012---0.194--5.283%
2017-03-29T03:10:18Jocelyn Larouchelow 4M19871711987171012---0.233--5.555%
2017-03-31T06:29:11Jocelyn Larouchelow 4M23846052384605012---0.280--5.833%
2017-05-22T21:10:26Jocelyn Larouchelow 4M28615262861526012---0.335--6.117%
2018-02-11T11:28:51Jocelyn Larouchelow 4M28615265723052012---0.458--6.941%
2018-03-01T12:55:02Jocelyn Larouchelow 4M286152611446104012---0.703--7.771%
2018-05-02T16:53:29Jocelyn Larouchelow 4M286152618277990012---0.996--8.333%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:54Mark RoseManual testing258260--0.063--
2010-04-11T14:32:00Architects CubedManual testing260261--0.084--
2016-02-23T16:28:54Mark RoseManual testing261262--0.168--
2011-03-08T05:14:00GrunwalderGIMPManual testing21263--0.873--
2016-02-23T16:28:54Mark RoseManual testing262263--0.537--
2015-04-25T21:24:00snme2pm1Manual testing263264--1.074--
2015-04-25T21:24:00snme2pm1Manual testing264265--2.044--
2015-09-04T17:59:00ramgeisManual testing265266--4.088--
2018-04-23T13:17:24TJAOIManual testing266267--8.177--
2019-06-24T09:36:03TJAOIManual testing267268--16.35--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.057 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.057 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5330.020%
25500000.77346.170%
302500000.04895.333%
3510000000.00299.781%


ECM Summary

B1B2factorcurvesGHz-days
500005000000543.729
50000500000010.069
50000660000019615.26


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computers8B85D765411F1AE70.099
2015-06-27T00:54:00MadPooManual testing8B85D765411F1AE70.099


PRP results:
dateuseridcompidcofactorsres64PRP
2019-11-25T08:34:49Niels_Mache_NextcloudSuperDry-X
10492021511740170245953
F71FC719516A129Bno
2019-11-25T08:49:40ATHec2-PRPCFDC
10492021511740170245953
F71FC719516A129Bno


P-1 factor-bounds graph:
B1 = 2861526, B2 = 182779900 (P-1 stage 2)
B1 = 2861526, B2 = 114461040 (P-1 stage 2)
B1 = 2861526, B2 = 57230520 (P-1 stage 2)
B1 = 2861526, B2 = 28615260 (P-1 stage 2)
B1 = 2384605, B2 = 23846050 (P-1 stage 2)
B1 = 1987171, B2 = 19871710 (P-1 stage 2)
B1 = 2861526 (P-1 stage 1)
B1 = 1655976, B2 = 16559760 (P-1 stage 2)
B1 = 500000, B2 = 36000000 (P-1 stage 2)
B1 = 2384605 (P-1 stage 1)
B1 = 500000, B2 = 30000000 (P-1 stage 2)
B1 = 1379980, B2 = 13799800 (P-1 stage 2)
B1 = 1987171 (P-1 stage 1)
B1 = 1655976 (P-1 stage 1)
B1 = 1379980 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 958320 (P-1 stage 1)
B1 = 798600 (P-1 stage 1)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-04-16T16:25:03+00:00